Matthews Standard Doorway dolly base package w/ side extensions Great camera platform when space and size is an issue. Perfect for use with our RONFORD STANDARD Sticks and Sacthler 25 cine head. The Matthews Doorway Dolly is designed with a wheel base of 28.25" without an extended axle. Overall length reaches 51" with a platform size of 27.5" x 41.5". The two side boards add 10" each. Ground clearance is 9" or 3" when inverted. Load capacity is 800 lb.